Keep your Upgrade Code constant. Store it as a project setting. Use a build script to:
Represents a family of related products. This code should stay consistent across different versions and languages to enable patching and major upgrades.
| Identifier | Scope | When it changes | Used for | | :--- | :--- | :--- | :--- | | | Per-version | Every major or minor release (if new install logic is needed) | Identifying the installed instance of a product. | | Package Code | Per-build | Every single build (always) | Uniquely identifying the .MSI file itself. Do not manually change this. | | Upgrade Code | Per-product | Never (over the lifetime of the product) | Linking all versions of the same product for major upgrades. | installshield product code
"In deployment, your code is your identity. Change it too often, and you’re a stranger. Never change it, and you’re a ghost. Get it just right, and nobody will ever know you were here."
The Product Code should be treated with care. , as it breaks the link between the installer and the already-installed product. Once you change a project's GUID, its previous GUID cannot be recovered. If you change the Product Code without proper upgrade logic, Windows Installer treats the new version as an unrelated product, potentially leading to multiple entries in the "Add or Remove Programs" list and causing installation conflicts. Keep your Upgrade Code constant
Open the project file (.ISM or .ISPROJ). Navigate to General Information . The Product Code is displayed in clear text.
This article provides an in-depth guide to understanding, locating, and managing InstallShield Product Codes in software packaging. What is an InstallShield Product Code? This code should stay consistent across different versions
Keep the Product Code identical if you are issuing a or a Minor Upgrade . These updates modify minor files or registry keys without altering the fundamental structure of the feature tree. In these scenarios, the version number changes, but the Product Code remains locked. When to Change the Product Code
The is not just a technical checkbox—it is a contract between your installer and the Windows operating system. Treat it with respect, document every change, and your users will enjoy seamless, professional upgrade experiences.
Additionally, change the code if you change the name of the executable file, modify the installation architecture (e.g., switching from 32-bit to 64-bit), or change the product language. How to Find and Modify the Product Code in InstallShield